org.plasma.sdo.xpath

Class DataGraphXPath

java.lang.Object

org.jaxen.BaseXPath

org.plasma.sdo.xpath.DefaultXPath

org.plasma.sdo.xpath.DataGraphXPath

All Implemented Interfaces:

Serializable, org.jaxen.XPath

public class DataGraphXPath
extends DefaultXPath

An XPath implementation for a data graph based on Jaxen.

This is the main entry point for matching an XPath against a data graph.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
DataGraphXPath(String xpathExpr)
DataGraphXPath(String xpathExpr, org.jaxen.Navigator navigator)

Method Summary

Modifier and Type	Method and Description
XPathDataObject[]	findDataObjects(DataObject root) Returns an array of Data Object results, an error being thrown if other than Data Object results are found or if multiple results are found but the target Property is not a "many" Property, i.e.
XPathDataProperty[]	findProperties(DataObject root) Returns an array of Property results, an error being thrown if other than Property results are found.
XPathDataProperty	findProperty(DataObject root) Returns a single Property result or null if no Property results are found.
org.jaxen.Context	getNodeContext(Object node)
DataGraphNodeAdapter[]	getResults(DataObject root) Returns an array with either 1 single result or multiple results, and error being thrown if no results are found or if multiple results are found but the target Property is not a "many" Property, i.e.

Methods inherited from class org.plasma.sdo.xpath.DefaultXPath

isXPath

Methods inherited from class org.jaxen.BaseXPath

addNamespace, booleanValueOf, createFunctionContext, createNamespaceContext, createVariableContext, debug, evaluate, getContext, getContextSupport, getFunctionContext, getNamespaceContext, getNavigator, getRootExpr, getVariableContext, numberValueOf, selectNodes, selectNodesForContext, selectSingleNode, selectSingleNodeForContext, setFunctionContext, setNamespaceContext, setVariableContext, stringValueOf, toString, valueOf

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

DataGraphXPath

public DataGraphXPath(String xpathExpr)
               throws org.jaxen.JaxenException

Throws:

org.jaxen.JaxenException

DataGraphXPath

public DataGraphXPath(String xpathExpr,
                      org.jaxen.Navigator navigator)
               throws org.jaxen.JaxenException

Throws:

org.jaxen.JaxenException

Method Detail

getNodeContext

public org.jaxen.Context getNodeContext(Object node)

getResults

public DataGraphNodeAdapter[] getResults(DataObject root)
                                  throws org.jaxen.JaxenException,
                                         InvalidMultiplicityException

Returns an array with either 1 single result or multiple results, and error being thrown if no results are found or if multiple results are found but the target Property is not a "many" Property, i.e. a multi-valued Property. The target Property is the result or end point Property after resolving an XPATH.

Returns:

an array with either 1 single result or multiple results.

Throws:

IllegalXPathArgumentException - if no results are found or if multiple results are found but the target Property is not a "many" property, i.e. a multi-valued Property. The target Property is the result or end point Property after resolving an XPATH.

org.jaxen.JaxenException - as required by the Jaxen API

InvalidMultiplicityException - if the given XPATH resulted in multiple values for a singular property

findProperties

public XPathDataProperty[] findProperties(DataObject root)
                                   throws org.jaxen.JaxenException,
                                          InvalidEndpointException

Returns an array of Property results, an error being thrown if other than Property results are found.

Returns:

an array of Property results or zero length array if no results are found.

Throws:

org.jaxen.JaxenException - as required by the Jaxen API

InvalidEndpointException - when the result or terminating node or nodes are not Property nodes

findProperty

public XPathDataProperty findProperty(DataObject root)
                               throws org.jaxen.JaxenException,
                                      InvalidEndpointException

Returns a single Property result or null if no Property results are found.

Returns:

an array of Property results or null if no results are found.

Throws:

org.jaxen.JaxenException - as required by the Jaxen API

InvalidEndpointException - when the result or terminating node or nodes are not Property nodes

findDataObjects

public XPathDataObject[] findDataObjects(DataObject root)
                                  throws org.jaxen.JaxenException,
                                         InvalidEndpointException,
                                         InvalidMultiplicityException

Returns an array of Data Object results, an error being thrown if other than Data Object results are found or if multiple results are found but the target Property is not a "many" Property, i.e. a multi-valued property. The target Property is the result or end point Property after resolving an XPATH.

Returns:

an array of Data Object results.

Throws:

IllegalXPathArgumentException - if other than Data Object results are found or if multiple results are found but the target Property is not a "many" Property, i.e. a multi-valued Property. The target Property is the result or end point Property after resolving an XPATH.

org.jaxen.JaxenException - as required by the Jaxen API

InvalidEndpointException - when the result or terminating node or nodes for an XPATH expression are not Data Object nodes

InvalidMultiplicityException - when multiple results are detected for a singular property